<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>将字符串"i come from beijing"倒置</title>
</head>
<body>
    <script>
        var str = "i come from beijing";
        console.log(str.split(" ").reverse().join(" "))
    </script>
</body>
</html>